Title:
SAR ADC TO WHICH SECONDARY NOISE SHAPING TECHNIQUE IS APPLIED
Document Type and Number:
WIPO Patent Application WO/2017/195911
Kind Code:
A1
Abstract:
The present invention relates to a successive approximation register (SAR) ADC to which a secondary noise shaping technique is applied, the SAR ADC comprising: an SAR capacitor DAC array for receiving an input analog signal, sampling an input voltage thereof, and storing the input voltage; a first preamplifier for amplifying a residual voltage remaining after performing an SAR operation in the SAR capacitor DAC array; a first integrator for receiving an input of a signal amplified by the first preamplifier and integrating the received signal through a single-gain buffer; a second preamplifier for receiving an input of an output signal of the first integrator and re-amplifying the received output signal; a second integrator for receiving an input of a signal amplified by the second preamplifier and integrating the received signal through the single-gain buffer; a comparator for comparing a voltage output from the second integrator with a reference voltage; and an SAR logic for outputting a digital signal on the basis of a difference voltage and controlling an SAR capacitor DAC.
Inventors:
AHN GIL CHO (KR)
KWAK YONG SIK (KR)
KWAK YONG SIK (KR)
Application Number:
PCT/KR2016/004889
Publication Date:
November 16, 2017
Filing Date:
May 10, 2016
Export Citation:
Assignee:
UNIV SOGANG RES FOUNDATION (KR)
International Classes:
H03M1/12; H03M1/08; H03M1/38
Foreign References:
| US9154151B1 | 2015-10-06 | |||
| US20140015699A1 | 2014-01-16 | |||
| US20140266827A1 | 2014-09-18 | |||
| US20130088376A1 | 2013-04-11 | |||
| US20120001781A1 | 2012-01-05 |
Attorney, Agent or Firm:
CHUNG HYUN PATENT & LAW FIRM (KR)
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